Fastening or anchoring means for insulator supporting pins



A. A. HOCHER July 9, 1940.

FASTENING OR ANCHORING MEANS FOR INSULATOR SUPPORTING PINS f g y/z mw M m k Patented July 9, 1940 e 2 207 9 UNITED STATES PATENT OFFICE FASTENING 0R ANCHORING MEANS FOR INSULATOR SUPPORTING PINS Andrew A. Hocher, Etna, Pa., assignor to Hubbard and Company, a corporation of Pennsylvania Application July 3, 1937, Serial'No. 151,881

Claims. (Cl. 287-20) This invention relates to support members of In Fig. l of the drawing there is illustrated a the pin type on which insulators are mounted support pin I having a tubular shank 2 which is to which, for example, line conductors are seprovided at one end with a fastening or looking cured, and more particularly to means for securdevice 3 constructed in accordance with one form 5 ing or anchoring such support members to cross or embodiment of the invention, and at the other 5:

arms, wall structures, or other primary supports. end with a threaded cage or thimble 4 on which One object of this invention is to provide a new an insulator may be mounted. Device 3 com-' and improved means for securing support pins prises elements or members 5 and 6 disposed on to primary support structures, for example, poles, opposite sides of the pin shank 2. Pin shank 2 o Walls, cross arms, etc., the support pins being is provide n i s opp i e with p rtur s 16 inserted in holes or apertures in the primary or p s 1 and 8 so shaped and formed that; support structure and the securing means assop y and inwardly n d Surfaces Or e es ciated with the pins acting on the walls of the 9 and ID are provided, respectively, at the sides holes or apertures surrounding the portion of Of these ap t f Supporting e s 5 and the pin disposed therein. I 6 and also for actuating members 5 and 6 into l5 Another object of the invention is to provide r t of lockiriap i i n wi h r sp o the wal1s a securing means that is particularly applicable of a pin hole fo d in a p y pp Such. to pins having hollow shanks throughout and for example, as a cross arm, telegraph pole, or' that are operable by a wedging action into the the wallof a building.

wall of the hole surrounding the portion of the Members 5 and 6 are somewhat arcuately 20 pin extending int th am shaped in transverse section so as to conform to Another object of the invention is to provide he contour of t e p i and are P d a fastening means that is efiectlve to anchor the th Screw threads I! on their outer surfaces. pin more and more firmly as the fastening means The pp e ds o members 5 and 6 a e fl y is correspondingly moved in its position. or movably connected by a bridge connection I2. 5-

other objects of the invention will, in part, be C nn t n I2 is f rm d y a lan l3 on memapparent and will, in part, be understood from the b that exte d through Opening 8 into the following description taken' in conjunction with inte ior of t e p h and a fl e on memthe accompanying drawing, in which her 5 that projects through opening 1 into the Figure 1 is a view partly in side elevation and pin s a k Fla I4 ov rli s fla 3 d is to partly in section of an insulator support pin proformed with a downwardly extending pin 15 that vided with a fastening or locking device made is received in an Ope v p e 15in flange in accordance with an embodiment of the in- Th the pp r nds of members 5 and 6 are vention; v in effect connected together by a bridgingmem- Figs. 2 and 3 are views in section taken onlines e having a hinged joint therein. 35 and m m respectively, of i 1 h The lower ends of members 5 and 6 may be held ing the construction 'of the locking device and in alignment with each other by ns of an its operative relationship with the shank of the d y turned fl e l1 0 be s av support pin; a slot 18 therein and an inwardly turned flange Fig. 4 is a partial view in side elevation of the on member 5 disposed belOW fla ge 7 and 40 shank of a, pin such as that shown in Fig, 1 proformed with a pin 20 that projects upwardly'into vided with a locking or anchoring device made slot [8. Thus the lower ends of members 4 and 5 in accordance with a modified form of the inay m v toward or w y from c h r, ut

v ntiom are held in alignment with each other by the pin Fig. 5 is a View of the pin of Fig. 4 illustrating 20 and slot [8. 45 the action'of the locking device when the pin is When members 5 and 6 are moved downwardly mounted in a hole of a cross arm, telegraph pole, along p shank 2 they are mOVed outwardly at or oth rrimary su ort; and an angleto the walls of the pin shank by the Fig. 6 is a view of the lower portion of the shank Wedgirig ct on Of Surfaces 9 and l0. 7 I of the'pin of either Fig. 1 or Fig, 4, as seen look- The operation of locking device 3 is as follows: 50

ing in the direction of arrows VI VI of Figs, 1 When the shank of pin I iS inserted in a hole 4 and 5 without the locking or anchoring device. in a cross arm or telegraph pole or other support Throughout the drawing and specification like until the flange 2| secured to the shank bears on reference characters designate corresponding the cross arm or pole, and the pin turned with parts. a wrench or other suitable tool, the screw threads 55 H on members 5 and 6 will cut into the walls of the pin hole. As the pin is turned the members 5 and 6 will advance because of the screw threads II, along the pin shank over surfaces 9 and lil and be moved radially outward into the Walls of the pin hole by the wedging action of surfaces 9 and Ill. The more the pin is turned and the more members 5 and 5 are advanced along surfaces 9 and ID the more firmly is the pin locked or secured in place, because members 5 and 6 are actuated radially outward to a greater extent the more they are advanced along the edges 9 and 59.

By turning the pin in the opposite direction, members 5 and 6 follow the threads formed in the wall of the pin hole and move upwardly along.

surfaces 9 and Hi out of gripping position, i. e., they are moved to the position shown in full lines in Fig. 1, the anchoring position being indicated by broken lines.

By inspection of Fig. 1, it will be apparent that openings 1 and 8 are cut at such an angle that surfaces 9 and I8 converge upwardly towards the longitudinal axis of the pin shank, that is, the upper portions of these edges are closer to the longitudinal axis of the pin than lower portions thereof; therefore edges 9 and if! act as wedges in respect to members 5 and 6 causing them to spread or fiare outwardly as they are moved downwardly along the pin shank.

Figs. 2 and 3 represent sectional views taken on lines II--II and III-III of Fig. 1 and illustrate the shape and construction of members 5 and G and also show how the edges of members 5 and 6 rest on surfaces 9 and H] of openings 1 and 8.

In Figs. 4, 5 and 6, a modified form of anchoring device is illustrated in connection with a pin shank such as shown in Fig. 1. The pin shank in these figures is provided with openings or apertures 22 and 23 located on diametrically opposite sides and shaped like the openings in the pin shank of Fig. 1. The anchoring device comprises wings or fingers 24 and 25 having a width great enough to bear on the opposite edges 26 of these openings and are connected at their upper ends by means of a bridging member or portion 21. This bridging member has a width substantially that of the minimum opening width as will be understood and is illustrated as being integral with the upper ends of the wings and is provided with a tapped opening 28 to accommodate a screw 29. The head 3!! of the screw is shaped to bear on the lower end of the pin shank and when this screw is turned it moves the anchoring or locking device downwardly along the wedging surfaces 26. When the pin is inserted in the pin hole of a cross arm, as shown in Fig. 5, and when the screw is turned in such a direction as to pull the locking device downwardly, wings 24 and 25 will spread outwardly and embed themselves in the walls of the pin hole in the manner indicated in Fig. 5. It will be apparent from inspection that the further the wings are pulled downwardly by the action of the screw, the further these members will be spread outwardly by the wedging surfaces 26 and the more firmly the anchoring device will lock the pin in its pin hole.

Thus it is seen in all of the forms of the invention illustrated, the looking or fastening actions of the fastening devices are accomplished by means of screws and wedging surfaces. In the form shownin. Figs. 1, 4 and 6, the wedging action is accomplished by means of wedging surfaces formed in the body of the pin shank and that in the one form the locking members are advanced by means of screw threads formed on the locking members, whereas in the other the locking members are moved into locking position by means of having a shank formed with wedging surfaces in the wall thereof, and a locking member adapted to be actuated by said surfaces into gripping position with the Walls of a pin hole when the shank is within the same, said locking member having screw threads thereon which when the pin shank is turned advance along the pin hole and the wedging surfaces causing the locking member to grip the pin hole walls.

2. In combination, an insulator support pin having a shank formed with wedging surfaces in the wall thereof, a locking member adapted to be actuated by said surfaces into gripping position with the walls of a pin hole when the shank is within the same, and a screw-threaded member having threaded engagement with said locking member for advancing the locking member over said wedging surfaces and into gripping engagement with the walls of the pin hole.

3. In combination, an insulator support pin having a tubular shank provided with opposed tapered slots therein, expansible fastening members adapted to ride on the sides of said slots and connected interiorly of said shank, and means for effecting relative movement of said fastening members along said slot sides to contract and expand the said fastening members for locking and unlocking purposes.

4. In combination, an insulator support pin having a hollow shankprovided with diametrically opposed apertures in the wall thereof, said apertures being formed at an angle to the axis of the shank so as to provide diverging surfaces, and locking members positioned in said apertures and bearing on said diverging surfaces, said members being flexibly connected at their upper ends at a point within the pin shank and having screw threads on their outer surfaces whereby when the pin is inserted in' a pin hole and the pin turned therein, the screw threads will advance along the pin hole and move said members along said bearing surfaces whereby said members are spread outwardly into gripping relation with the walls of the pin hole.

5. In combination, an insulator support pin having a hollow shank provided with oppositely positioned apertures in the walls thereof, said apertures being formed at an angle to the axis of the shank so as to provide downwardly diverging surfaces, locking members positioned in said apertures and bearing on said diverging surfaces, a bridge member connecting said members, and a screw having threaded engagement with the bridge member'for advancing the same axially thereof and moving said locking members along said diverging surfaces into gripping position with the Wall of a pin hole when the shank is inserted therein.

ANDREW A. HOCI-IER. 

